Enhanced hydrogen storage properties of LiBH4 modified by NbF5 |
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| Authors: | Huaqin Kou Ge Sang Yuanlin Zhou Xiaoying Wang Zhiyong Huang Wenhua Luo Lixin Chen Xuezhang Xiao Guiying Yang Changwen Hu |
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| Affiliation: | 1. Science and Technology on Surface Physics and Chemistry Laboratory, P.O. Box 718-35, Mianyang 621907, China;2. State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China;3. China Academy of Engineering Physics, P.O. Box 919-71, Mianyang 621900, China;4. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;5. School of Chemistry, Beijing Institute of Technology, South Zhongguancun Street, Beijing 100081, China |
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| Abstract: | ![]()
In this work, the hydriding–dehydriding properties of the LiBH4–NbF5 mixtures were investigated. It was found that the dehydrogenation and reversibility properties of LiBH4 were significantly improved by NbF5. Temperature-programed dehydrogenation (TPD) showed that 5LiBH4–NbF5 sample started releasing hydrogen from as low as 60 °C, and 4 wt.% hydrogen could be obtained below 255 °C. Meanwhile, ∼7 wt.% H2 could be reached at 400 °C in 20LiBH4–NbF5 sample, whereas pristine LiBH4 only released ∼0.7 wt.% H2. In addition, reversibility measurement demonstrated that over 4.4 wt.% H2 could still be released even during the fifth dehydrogenation in 20LiBH4–NbF5 sample. The experimental results suggested that a new borohydride possibly formed during ball milling the LiBH4–NbF5 mixtures might be the source of the active effect of NbF5 on LiBH4. |
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| Keywords: | Hydrogen storage LiBH4 NbF5 Dehydrogenation Reversibility |
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